Application Diagrams
5V
V
OUT
Battery
Ignition
V
IN
C **
2
C *
1
10mF*
0.1mF
CS8140
V
cc
2.7kW
(optional)
ENABLE
DELAY
RESET
WDI
RESET
WATCHDOG
PORT
0.1mF
Gnd
R***
MICROPROCESSOR
*C1 is required if regulator is located far from the power source filter.
**C2 required for stability
***R ² 80k½
Figure 7. Application Diagram
9V
V
OUT
V
IN
CS8140/1
Switch
R
110K
1
RESET
WDI
ENABLE
C
0.1mF
1
C
Gnd
Delay
C
0.1mF
2
V
cc
10mF
2.7k
MICROPROCESSOR
RESET
WATCHDOG PORT
Figure 8. Applications diagram for CS8140. The CS8140 provides a 5V tightly regulated supply and control function to the microprocessor. In this
application, the microprocessor controls its own power down sequence (see text).
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